We do that and usually stop at Bell Services to pick up our bags when we return before we head to our room. We still tip the CM, but I don't like waiting for them to bring them to the room. I'm too ready to get unpacked. If you have a lot of bags or don't mind waiting, then by all means call and have them do the transporting! You just have to be in the room to receive your things, unlike Magical Express, which will drop off without anyone in the room, and doesn't accept tips even if you do happen to be there.